32 lines
302 B
Bash
Executable File
32 lines
302 B
Bash
Executable File
#! /bin/sh
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if [[ $# -ne 1 ]]
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then
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echo "USAGE: timer <number>"
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exit 10
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fi
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if [[ $1 =~ 'help' ]]
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then
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echo "Timer : timer <n sec>"
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exit 0
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fi
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if [[ $1 -le 0 ]]
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then
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echo "The argument must be greater than 0"
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exit 11
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fi
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for ((i=$1;i>=0;i--))
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do
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sleep 1
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clear
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echo $i
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done
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read
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clear
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exit 0
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